Do it right. I have two examples of why from personal experience.
1. Me and wife lived with parents for a short time after we moved.
He had washing machine on back porch that needed draining every use in
cold weather. Connections backward and I hooked it up one morning by
convention. Ruined an entire load of my wife's uniforms that required
the delicate setting.
2. Did a basement replumb replacing all pipes. Somehow I got the
laundry tub ones backward. "I'm the only one who usese, I'll
remember"...nope - after almost burning myself twice when expecting
cold water I redid it by crossing the pipes coming from the ceiling
(too cramped up there to reverse them right).
That IS the north american standard.
Many places in Europe it is reversed - and in Africa some places it's
one way, other places the other.
When I was in Zambia in the 70s it was hard to know which was which in
the hot season, what with exposed plumbing on the outside of masonry
walls!!!!!! BOTH taps gave hot water, even with the geiser shut down.
(City water flowed to a gravity tank up among the rafters under the
tin roof, and from there down the sunny wall to the kitchen and bath)
It applies to all plumbing, but really, it's not that big of a deal. If
properly marked, it should not be an issue. You can buy red and blue hose
bibb handles at the hardware store. Washing machines get hooked up once
every 15 years or so, it's not like you're making hose connections there
Yeah same in some Gulf states. No freezing temps of course. Low
pressure mains water was accumulated from the street mains in a big
tank at ground level in the yard. Then another pump raised that to
another tank on the roof. Both tanks although painted white were out
in the open with the sun beating on them. Identical systems for each
By February too hot to walk across the tiled yard in bare feet by
11.00 AM; so you can imagine how hot the 'cold' water was.
Sewage was frequently not piped away to a treatment plant; in many
compounds it was accumulated in large underground tanks. Then a large
tanker, typically with two Honda type pumps mounted at the back would
come and suck it up, which took some time and could be quite odorous
on a hot day! The pumping operation often occurred twice a week about
50 feet from some one's front door
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